Reports say that there's been an explosion on the Metropolitan Line between Liverpool Street and Aldgate, and further explosions have been reported at Aldgate East, Edgware Road, King's Cross, Russell Square and Moorgate. Two Underground trains have collided near King's Cross.

The entire tube network, and central buses have been closed, and hospitals have stopped accepting non-emergency casualties. No official reports of fatalities yet, but there have been several eyewitness accounts suggesting that there are several dead. It's not looking good.

The official announcements (thus far) are SIX explosions: five on the underground, one on a bus. Haven't heard about the tube trains colliding - is there a source for this? Blair HAS announced that this is a terrorist attack, but he's prone to 'mistakes' so I'd wait for some (one with) intelligence. An Al-Qaeda splinter group is supposed to have claimed responsibility, but again such groups have previously claimed responsibility for other attacks they had nothing to do with, so that's not a trustworthy claim.

Such a shame: the city that teemed with over 2 million people protesting against the war in Iraq is now a target for other people most probably protesting against the same war.